SUMMERFIELD CH 50
Carrying SUMMERFIELD CH 50 over RHEINHARDT SLOUGH
1.3MI N ILL RTE 177, St. Clair, Illinois
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SUMMERFIELD CH 50 in St. Clair, Illinois sits above 77% of rated Illinois bridges on inventory load rating (40 t), while its 1943 build year is earlier than 90% of St. Clair's recorded-year cohort (486 bridges).
SUMMERFIELD CH 50 in St. Clair, Illinois is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1943, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure IL:082301900000000
PRE-1950 · CONCRETE · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: SUMMERFIELD CH 50
The SUMMERFIELD CH 50 bridge in St. Clair, Illinois carries SUMMERFIELD CH 50 over RHEINHARDT SLOUGH. It was built in 1943, making it 83 years old today. The structure is built primarily of concrete and spans 3 sections, stretching 7.3 meters (24 feet) end to end. Daily traffic averages 250 vehicles, placing it in the lower-traffic tier of Illinois bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 6/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How SUMMERFIELD CH 50 compares
Age against the county: built in 1943, earlier than 439 of St. Clair's 486 bridges with a recorded construction year (90%), against a county median build year of 1979. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Illinois bridges with a recorded inventory load rating (26,904 of 26,928 rated).
SUMMERFIELD CH 50 vs every rated Illinois bridge
Inventory load rating (metric tons), FHWA NBI, this state
40 Top 23% higher than 77% of 26,904 bridges
rated Illinois bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
St. Clair inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 486 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1943
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 7.3 m (24 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 250 vehicles/day
- Structure Number
- 082301900000000
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether SUMMERFIELD CH 50 is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare SUMMERFIELD CH 50 against other structures in St. Clair and across Illinois. Illinois bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for SUMMERFIELD CH 50?
SUMMERFIELD CH 50 in St. Clair, Illinois on the FHWA's 0–9 scale.
How often is SUMMERFIELD CH 50 inspected?
SUMMERFIELD CH 50's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 250 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SUMMERFIELD CH 50 is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SUMMERFIELD CH 50?
SUMMERFIELD CH 50 has an NBI inventory load rating of 39.5 metric tons.
Who is responsible for maintaining SUMMERFIELD CH 50?
SUMMERFIELD CH 50 is owned and maintained by County Highway Agency.
How old is SUMMERFIELD CH 50 and does age affect safety?
SUMMERFIELD CH 50 was built in 1943, making it 83 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.